My Baby's Soft Spot Looks Bulging
Medically reviewed by Dr. Michael Okonkwo, MD, FAAP · Board-Certified Neonatologist
Content reviewed against published AAP, CDC, AAP guidelines
Last reviewed:
If your baby has been diagnosed with or you suspect soft spot looks bulging, here is what the evidence says.
The short answer
A bulging fontanelle can be a sign of increased pressure inside the skull and needs immediate medical attention, especially if your baby also has a fever, vomiting, or seems very unwell. However, brief bulging during crying or straining is normal. The key is whether it stays bulging when your baby is calm and upright.
Key takeaways
- A bulging fontanelle can be a sign of increased pressure inside the skull and needs immediate medical attention, especially if your baby also has a fever, vomiting, or seems very unwell. However, brief bulging during crying or straining is normal. The key is whether it stays bulging when your baby is calm and upright.
- Usually normal when: The fontanelle bulges or tenses only when your baby is crying, coughing, or straining
- Call your doctor if: The fontanelle remains bulging and tense when your baby is calm and upright
- Varies by age — see the age-by-age breakdown below
“Fever itself is not an illness — rather, it is a sign or symptom that the body is fighting an infection. Fever stimulates certain defenses, such as the white blood cells, which attack and destroy invading bacteria.”
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What Parents Should Know
According to AAP, CDC guidelines, a bulging fontanelle can be a sign of increased pressure inside the skull and needs immediate medical attention, especially if your baby also has a fever, vomiting, or seems very unwell. However, brief bulging during crying or straining is normal. The key is whether it stays bulging when your baby is calm and upright. At 0-3 months, in newborns, the fontanelle should feel soft and flat when your baby is calm and upright. It's normal to see gentle pulsing and slight fullness when crying. However, if the fontanelle remains bulging or tense when your baby is calm, or if your baby has a fever, poor feeding, or unusual sleepiness, seek immediate medical care as this could indicate meningitis or another serious infection. It is generally considered normal when the fontanelle bulges or tenses only when your baby is crying, coughing, or straining. However, you should contact your pediatrician promptly if the fontanelle remains bulging and tense when your baby is calm and upright.
Normal vs. Concerning
When to Seek Immediate Care
- The fontanelle remains bulging and tense when your baby is calm and upright
- Your baby has a bulging fontanelle along with fever, vomiting, seizure, or extreme irritability
- Your baby seems very unwell, is difficult to wake, has a weak cry, or has a stiff neck
- Your baby had a significant head injury and now has a bulging fontanelle
By Age
What to expect by age
0-3 months
In newborns, the fontanelle should feel soft and flat when your baby is calm and upright. It's normal to see gentle pulsing and slight fullness when crying. However, if the fontanelle remains bulging or tense when your baby is calm, or if your baby has a fever, poor feeding, or unusual sleepiness, seek immediate medical care as this could indicate meningitis or another serious infection.
3-6 months
You may notice the fontanelle tenses and bulges briefly when your baby cries, coughs, or has a bowel movement - this is completely normal. What matters is the appearance when calm and upright. A persistently bulging fontanelle, especially with other symptoms like high fever, irritability, or lethargy, requires urgent evaluation.
6-12 months
As your baby becomes more active, you might see the fontanelle react to exertion or crying. This is normal. A bulging soft spot to worry about is one that stays full and tense even when your baby is calm, quiet, and sitting upright. If accompanied by vomiting, fever, seizures, or a stiff neck, go to the emergency department immediately.
12-18 months
The fontanelle is smaller now but should still not bulge when your toddler is calm. Conditions like shunt malfunction (in children with hydrocephalus), severe head injury, or infections can cause a bulging fontanelle. If you notice persistent bulging, especially after a fall or with illness, seek urgent medical attention.
18 months+
Most children's fontanelles close between 18 and 24 months. Once closed, this sign is no longer useful. If your toddler's fontanelle is still open and appears bulging along with symptoms like severe headache, vomiting, or altered consciousness, go to the emergency department.
What to Tell Your Pediatrician
- Describe when you first noticed soft spot looks bulging and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if you're unsure whether the fontanelle is truly bulging or just normal pulsing.
- Mention if your baby's fontanelle seems slightly fuller than usual but your baby is completely well.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- The fontanelle bulges or tenses only when your baby is crying, coughing, or straining
- The soft spot returns to flat and soft immediately when your baby is calm
- You can see gentle pulsing in the fontanelle in rhythm with your baby's heartbeat
- Your baby is otherwise well, feeding normally, and acting like themselves
- You're unsure whether the fontanelle is truly bulging or just normal pulsing
- Your baby's fontanelle seems slightly fuller than usual but your baby is completely well
- You want your pediatrician to check the fontanelle at the next well visit to give you a baseline
- The fontanelle remains bulging and tense when your baby is calm and upright
- Your baby has a bulging fontanelle along with fever, vomiting, seizure, or extreme irritability
- Your baby seems very unwell, is difficult to wake, has a weak cry, or has a stiff neck
- Your baby had a significant head injury and now has a bulging fontanelle
What You Can Do at Home
- Keep track of when you notice soft spot looks bulging — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that the fontanelle bulges or tenses only when your baby is crying, coughing, or straining — this is generally within the range of normal.
- At 0-3 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Follow any care instructions from your pediatrician. Keep a written log of symptoms to bring to appointments.
- While monitoring at home, seek immediate care if the fontanelle remains bulging and tense when your baby is calm and upright.
Related Resources
Frequently asked questions
Is soft spot looks bulging normal?
When should I call the doctor about soft spot looks bulging?
When is soft spot looks bulging normal?
What causes soft spot looks bulging?
What should I mention to my pediatrician about soft spot looks bulging?
Is soft spot looks bulging normal at 0-3 months?
Is soft spot looks bulging normal at 3-6 months?
Should I go to the ER for soft spot looks bulging?
Does soft spot looks bulging go away on its own?
References
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss My Baby's Soft Spot Looks Bulging.
Things to mention
- Describe when you first noticed soft spot looks bulging and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if you're unsure whether the fontanelle is truly bulging or just normal pulsing.
- Mention if your baby's fontanelle seems slightly fuller than usual but your baby is completely well.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- You're unsure whether the fontanelle is truly bulging or just normal pulsing
- Your baby's fontanelle seems slightly fuller than usual but your baby is completely well
- You want your pediatrician to check the fontanelle at the next well visit to give you a baseline
Urgent signs to report immediately
- The fontanelle remains bulging and tense when your baby is calm and upright
- Your baby has a bulging fontanelle along with fever, vomiting, seizure, or extreme irritability
- Your baby seems very unwell, is difficult to wake, has a weak cry, or has a stiff neck
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of soft spot looks bulging are normal. Talk to your pediatrician if the fontanelle remains bulging and tense when your baby is calm and upright.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
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